THE HOT EXTRUSION OF METAL POWDERS

Abstract

The procedure of consolidating metal powders by isostatic compaction, canning, and hot extrusion is described. The properties of a number of nickel. base alloys and stainless steels prepared by this method are given.

It is concluded that, even when no precautions are taken to eliminate air (oxygen) from the canned billet, the resulting oxide content of the extruded bar is insufficient to exert a serious influence on the mechanical properties. The corrosion-resistances of certain stainless-steel samples, extruded from powders, were found to be somewhat lower than the corrosion-resistance of equivalent conventionally wrought products.